One vertex per element, one color per generator, with an edge from x to x·s.
(2,5)(6,8)(9,10,14,15)(11,13,18,16)(12,20,22,17)(19,23,24,21)(25,26)(27,33)(28,34)(29,35)(30,36)(31,32)(37,42)(38,48)(39,49)(40,44)(41,46)(43,50)(45,47)(51,54)(52,55)(53,56)(3,7)(6,8)(10,15)(11,18)(17,20)(19,24)(26,32)(28,33)(29,41)(36,47)(37,49)(40,48)(43,53)(51,55) involution — undirected(1,2)(3,6)(4,5)(7,8)(9,11,14,18)(10,16,15,13)(12,19,22,24)(17,23,20,21)(25,27,31,34)(26,33,32,28)(29,37,41,49)(30,44,45,38)(35,42,46,39)(36,40,47,48)(43,55,53,51)(50,52,56,54)(1,3)(2,6)(4,7)(5,8)(9,10)(11,16)(12,17)(13,18)(14,15)(19,23)(20,22)(21,24)(25,28,31,33)(26,34,32,27)(29,42,41,39)(30,40,45,48)(35,37,46,49)(36,44,47,38)(43,54,53,52)(50,51,56,55)(1,2)(3,6)(4,5)(7,8)(9,12,14,22)(10,17,15,20)(11,19,18,24)(13,21,16,23)(25,29)(26,35)(27,37)(28,39)(30,43)(31,41)(32,46)(33,42)(34,49)(36,50)(38,51)(40,52)(44,55)(45,53)(47,56)(48,54)(9,13,14,16)(10,18,15,11)(12,21,22,23)(17,24,20,19)(25,30,31,45)(26,36,32,47)(27,38,34,44)(28,40,33,48)(29,43,41,53)(35,50,46,56)(37,51,49,55)(39,52,42,54)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.